參數(shù)資料
型號(hào)： LM322N
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 模擬波形發(fā)生器
英文描述： Precision Timers
中文描述： RECTANGULAR, TIMER, PDIP14
封裝： 0.300 INCH, PLASTIC, DIP-14
文件頁(yè)數(shù)： 2/14頁(yè)
文件大?。?/td> 281K
代理商： LM322N
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Power Dissipation
V
a
Voltage
500 mW
40V
Collector Output Voltage
40V
V
REF
Current
Trigger Voltage
5 mA
g
40V
V
ADJ
Voltage (Forced)
5V
Logic Reverse Voltage
5.5V
Output Short Circuit Duration (Note 1)
Lead Temperature
(Soldering, 10 sec.)
260
§
C
Operating Temperature Range
LM122
LM322
LM3905
b
55
§
C
s
T
A
s
a
125
§
C
0
§
C
s
T
A
s
a
70
§
C
0
§
C
s
T
A
s
a
70
§
C
Electrical Characteristics
(Note 2)
Parameter
Conditions
LM122
LM322
LM3905
Units
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Timing Ratio
T
A
e
25
§
C, 4.5V
s
V
a
s
40V 0.626 0.632 0.638 0.620 0.632 0.644 0.620 0.632 0.644
Boost Tied to V
a
, (Note 3)
0.620 0.632 0.644 0.620 0.632 0.644
Comparator Input
Current
T
A
e
25
§
C, 4.5V
s
V
a
s
40V
Boost Tied to V
a
0.3
30
1.0
100
0.3
30
1.5
100
0.5
1.5
nA
nA
Trigger Voltage
T
A
e
25
§
C, 4.5V
s
V
a
s
40V
T
A
e
25
§
C, V
TRIG
e
2V
T
A
t
25
§
C, 4.5V
s
V
a
s
40V
4.5V
s
V
a
s
40V
Boost Tied to V
a
1.2
1.6
2
1.2
1.6
2
1.2
1.6
2
V
Trigger Current
25
25
25
m
A
Supply Current
2.5
4
2.5
4.5
2.5
4.5
mA
Timing Ratio
0.62
0.62
0.644
0.644
0.61
0.61
0.654
0.654
0.61
0.654
Comparator Input
Current
4.5V
s
V
a
s
40V
Boost Tied to V
a
, (Note 4)
b
5
5
b
2
2
b
2.5
2.5
nA
nA
100
150
Trigger Voltage
4.5V
s
V
a
s
40V
0.8
2.5
0.8
2.5
0.8
2.5
V
Trigger Current
V
TRIG
e
2.5V
200
200
200
m
A
Output Leakage
Current
V
CE
e
40V
1
5
5
m
A
Capacitor Saturation
Voltage
R
t
t
1 M
X
R
t
e
10 k
X
2.5
25
2.5
25
2.5
25
mV
mV
Reset Resistance
150
150
150
X
Reference Voltage
T
A
e
25
§
C
3
3.15
3.3
3
3.15
3.3
3
3.15
3.3
V
Reference Regulation
0
s
I
OUT
s
3 mA
4.5V
s
V
a
s
40V
20
6
50
25
20
6
50
25
20
6
50
25
mV
mV
Collector Saturation
Voltage
I
L
e
8 mA
I
L
e
50 mA
T
A
e
25
§
C, I
L
e
3 mA
T
A
e
25
§
C, I
L
e
50 mA
0.25
0.7
0.4
1.4
0.25
0.7
0.4
1.4
0.25
0.7
0.4
1.4
V
V
Emitter Saturation
Voltage
1.8
2.1
2.2
3
1.8
2.1
2.2
3
1.8
2.1
2.2
3
V
V
Average Temperature
Coefficient of Timing
Ratio
0.003
0.003
0.003
%/
§
C
Minimum Trigger Width V
TRIG
e
3V
Note 1:
Continuous output shorts are not allowed. Short circuit duration at ambient temperatures up to 40
§
C may be calculated from t
e
120/V
CE
seconds, where
V
CE
is the collector to emitter voltage across the output transistor during the short.
Note 2:
These specifications apply for T
AMIN
s
T
A
s
T
AMAX
unless otherwise noted.
Note 3:
Output pulse width can be calculated from the following equation: t
e
(R
t
) (C
t
)
[
1
b
2(0.632
b
r)
b
V
C
/V
REF
) where r is timing ratio and V
C
is capacitor
saturation voltage. This reduces to t
e
(R
t
) (C
t
) for all but the most critical applications.
Note 4:
Sign reversal may occur at high temperatures (
l
100
§
C) where comparator input current is predominately leakage. See typcial curves.
Note 5:
Refer to RETS122X drawing of military LM122H version for specifications.
0.25
0.25
0.25
m
s
2
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